upstream/mercurial-mirror Files · mercurial/thirdparty/attr/__init__.py

setdiscovery: precompute children revisions to avoid quadratic lookup...

setdiscovery: precompute children revisions to avoid quadratic lookup Moving away from dagutil a few commits ago introduced quadratic behavior when resolving children revisions during discovery. This commit introduces a precompute step of the children revisions to avoid the bad behavior. I believe the new code should have near identical performance to what dagutil was doing before. Behavior is still slightly different because we take into account filtered revisions. But this change was made when we moved off dagutil. I added a comment about multiple invocations of this function redundantly calculating the children revisions. I believe this potentially undesirable behavior was present when we used dagutil, as the call to inverse() previously in this function created a new object and required computing children on every invocation. I thought we should document the potential for a performance issue rather than let it go undocumented. Differential Revision: https://phab.mercurial-scm.org/D4326

Siddharth Agarwal - - Load All Authors

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             __init__.py
        
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      from __future__ import absolute_import, division, print_function

      from ._funcs import (

          asdict,

          assoc,

          astuple,

          evolve,

          has,

      )

      from ._make import (

          Attribute,

          Factory,

          NOTHING,

          attr,

          attributes,

          fields,

          make_class,

          validate,

      )

      from ._config import (

          get_run_validators,

          set_run_validators,

      )

      from . import exceptions

      from . import filters

      from . import converters

      from . import validators

      __version__ = "17.2.0"

      __title__ = "attrs"

      __description__ = "Classes Without Boilerplate"

      __uri__ = "http://www.attrs.org/"

      __doc__ = __description__ + " <" + __uri__ + ">"

      __author__ = "Hynek Schlawack"

      __email__ = "hs@ox.cx"

      __license__ = "MIT"

      __copyright__ = "Copyright (c) 2015 Hynek Schlawack"

      s = attrs = attributes

      ib = attrib = attr

      __all__ = [

          "Attribute",

          "Factory",

          "NOTHING",

          "asdict",

          "assoc",

          "astuple",

          "attr",

          "attrib",

          "attributes",

          "attrs",

          "converters",

          "evolve",

          "exceptions",

          "fields",

          "filters",

          "get_run_validators",

          "has",

          "ib",

          "make_class",

          "s",

          "set_run_validators",

          "validate",

          "validators",

      ]

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				from __future__ import absolute_import, division, print_function

				from ._funcs import (
				asdict,
				assoc,
				astuple,
				evolve,
				has,
				)
				from ._make import (
				Attribute,
				Factory,
				NOTHING,
				attr,
				attributes,
				fields,
				make_class,
				validate,
				)
				from ._config import (
				get_run_validators,
				set_run_validators,
				)
				from . import exceptions
				from . import filters
				from . import converters
				from . import validators


				__version__ = "17.2.0"

				__title__ = "attrs"
				__description__ = "Classes Without Boilerplate"
				__uri__ = "http://www.attrs.org/"
				__doc__ = __description__ + " <" + __uri__ + ">"

				__author__ = "Hynek Schlawack"
				__email__ = "hs@ox.cx"

				__license__ = "MIT"
				__copyright__ = "Copyright (c) 2015 Hynek Schlawack"


				s = attrs = attributes
				ib = attrib = attr

				__all__ = [
				"Attribute",
				"Factory",
				"NOTHING",
				"asdict",
				"assoc",
				"astuple",
				"attr",
				"attrib",
				"attributes",
				"attrs",
				"converters",
				"evolve",
				"exceptions",
				"fields",
				"filters",
				"get_run_validators",
				"has",
				"ib",
				"make_class",
				"s",
				"set_run_validators",
				"validate",
				"validators",
				]